"There is increasing certainty in the track and location of the heaviest snow."

Amber weather warning for all of North Wales (Image: Met Office)

Today, the counties to the north east of Wales - Conwy, Denbighshire, Flintshire and Wrexham have experienced the worst conditions.

Dozens of schools have been closed in Wrexham, Flintshire and Denbighshire as well as libraries with some roads closed and warnings for people not to venture on others.

Denbighshire council tweeted: “Gritting has taken place overnight and will continue during today. Periods of heavy snow showers are expected today and additional gritters are out to assist the main fleet.”

They added: “There will be major delays to public transport services within Denbighshire today due to adverse weather conditions and several road traffic collisions.

“Many routes will be affected throughout the county with only coastal areas currently unaffected.”

Current driving conditions on the A55 at J30 westbound (Image: Traffic Wales)

Conditions on the A494 Ruthin to Denbigh are said to be “difficult” as well as the B4501 Cerrigydrydion to Llyn Brenig and parts of the A483.

Motorists were being advised to avoid the area if possible.

The bus service 55 Ruthin-Corwen is currently not operating. Bwlch yr Oernant (The Horseshoe Pass) is also closed.

The Met Office said that icy surfaces are also likely to be an additional hazard, especially overnight.

Video Loading

Video Unavailable

Click to playTap to play

The video will start in 8Cancel

Play now

They warn that it will cause possible travel delays on roads stranding some vehicles and passengers with possible delays and cancellations to rail and air travel.

A spokesman said: “Some rural communities could be cut off and power supplies interrupted. Probably some icy stretches on some untreated roads, pavements and cycle paths and also a chance of injuries from slips and falls on icy and snowy surfaces.”